本试验旨在研究日粮阴阳离子平衡(DCAB)对绵羊瘤胃挥发性脂肪酸和血液指标的影响。选用(45±3)kg的杂交羊(东北细毛羊×小尾寒羊)4只，采用4×4拉丁方试验设计，分别饲喂DCAB为+239.16、+104.37、-0.83和-127.59 mEq/kg DM的日粮。结果表明，DCAB对绵羊尿液pH有极显著的影响(P<0.01)；对瘤胃挥发性脂肪酸的浓度和比例影响不显著(P>0.05)，但DCAB最高和最低组瘤胃挥发性脂肪酸浓度均较低；对绵羊血糖、血清非酯化脂肪酸、高密度脂蛋白和低密度脂蛋白含量影响不显著(P>0.05)，但DCAB最高和最低组甘油三酯浓度较低(P<0.05)；对胰岛素、胰高血糖素、生长激素、三碘甲腺原氨酸和甲状腺素影响不显著(P>0.05)。结果提示，DCAB对绵羊脂肪代谢相关的血液指标有一定的影响。

The experiment was conducted to study the effects of dietary cation-anion balance (DCAB) on rumen volatile fatty acids and blood indexes in sheep. Four crossed-bred (Northeast fine sheep×Small tail Han sheep) sheep with an average weight of (45±3) kg were used in a 4×4 Latin square design. The groups received the same basal diet with different DCAB as +239.16, +104.37, －0.83 and －127.59 mEq/kg DM. The results showed that DCAB significantly affected pH in urine of sheep (P<0.01); there were no significant effects on the ratio of volatile fatty acids (P>0.05), however, the highest DCAB and the lowest DCAB groups had lower concentration of volatile fatty acids; there were no significant effects on the concentration of glucose (GLU), nonesterified fatty acid (NEFA), high density lipoprotein (HDL) and low density lipoprotein (LDL) in serum (P>0.05), however, the highest DCAB and the lowest DCAB groups had lower concentration of triglyceride (TG); there were no significant effects on the concentration of insulin (INS), glucagon (IRG), growth hormone (GH), triiodothyronine (T3) and tetraiodothyronine (T4) (P>0.05). In conclusion, these results indicated that DCAB could improve blood indexes about the metabolism of fat in sheep.［Chinese Journal of Animal Nutrition, 2010，22（3）:769-774］